Core(M): Ignore -Wpedantic on Armv8-M core headers.

The MPU register definition makes use of (non ISO C99) features, i.e.
the struct definition contains unnamed structs/unions, deliberately.

Change-Id: I98beb3503c5859a6fb987f25e01b296459ecc18a

CMSIS/Core/Include/core_armv81mml.h

@@ -23,9 +23,11 @@
  */
 
 #if   defined ( __ICCARM__ )
-  #pragma system_include         /* treat file as system include file for MISRA check */
+  #pragma system_include                        /* treat file as system include file for MISRA check */
 #elif defined (__clang__)
-  #pragma clang system_header   /* treat file as system include file */
+  #pragma clang system_header                   /* treat file as system include file */
+#elif defined ( __GNUC__ )
+  #pragma GCC diagnostic ignored "-Wpedantic"   /* disable pedantic warning due to unnamed structs/unions */
 #endif
 
 #ifndef __CORE_ARMV81MML_H_GENERIC

CMSIS/Core/Include/core_armv8mbl.h

@@ -23,9 +23,11 @@
  */
 
 #if   defined ( __ICCARM__ )
-  #pragma system_include         /* treat file as system include file for MISRA check */
+  #pragma system_include                        /* treat file as system include file for MISRA check */
 #elif defined (__clang__)
-  #pragma clang system_header   /* treat file as system include file */
+  #pragma clang system_header                   /* treat file as system include file */
+#elif defined ( __GNUC__ )
+  #pragma GCC diagnostic ignored "-Wpedantic"   /* disable pedantic warning due to unnamed structs/unions */
 #endif
 
 #ifndef __CORE_ARMV8MBL_H_GENERIC

CMSIS/Core/Include/core_armv8mml.h

@@ -23,9 +23,11 @@
  */
 
 #if   defined ( __ICCARM__ )
-  #pragma system_include         /* treat file as system include file for MISRA check */
+  #pragma system_include                        /* treat file as system include file for MISRA check */
 #elif defined (__clang__)
-  #pragma clang system_header   /* treat file as system include file */
+  #pragma clang system_header                   /* treat file as system include file */
+#elif defined ( __GNUC__ )
+  #pragma GCC diagnostic ignored "-Wpedantic"   /* disable pedantic warning due to unnamed structs/unions */
 #endif
 
 #ifndef __CORE_ARMV8MML_H_GENERIC

CMSIS/Core/Include/core_cm23.h

@@ -23,9 +23,11 @@
  */
 
 #if   defined ( __ICCARM__ )
-  #pragma system_include         /* treat file as system include file for MISRA check */
+  #pragma system_include                        /* treat file as system include file for MISRA check */
 #elif defined (__clang__)
-  #pragma clang system_header   /* treat file as system include file */
+  #pragma clang system_header                   /* treat file as system include file */
+#elif defined ( __GNUC__ )
+  #pragma GCC diagnostic ignored "-Wpedantic"   /* disable pedantic warning due to unnamed structs/unions */
 #endif
 
 #ifndef __CORE_CM23_H_GENERIC

CMSIS/Core/Include/core_cm33.h

@@ -23,9 +23,11 @@
  */
 
 #if   defined ( __ICCARM__ )
-  #pragma system_include         /* treat file as system include file for MISRA check */
+  #pragma system_include                        /* treat file as system include file for MISRA check */
 #elif defined (__clang__)
-  #pragma clang system_header   /* treat file as system include file */
+  #pragma clang system_header                   /* treat file as system include file */
+#elif defined ( __GNUC__ )
+  #pragma GCC diagnostic ignored "-Wpedantic"   /* disable pedantic warning due to unnamed structs/unions */
 #endif
 
 #ifndef __CORE_CM33_H_GENERIC

CMSIS/Core/Include/core_cm35p.h

@@ -23,9 +23,11 @@
  */
 
 #if   defined ( __ICCARM__ )
-  #pragma system_include         /* treat file as system include file for MISRA check */
+  #pragma system_include                        /* treat file as system include file for MISRA check */
 #elif defined (__clang__)
-  #pragma clang system_header   /* treat file as system include file */
+  #pragma clang system_header                   /* treat file as system include file */
+#elif defined ( __GNUC__ )
+  #pragma GCC diagnostic ignored "-Wpedantic"   /* disable pedantic warning due to unnamed structs/unions */
 #endif
 
 #ifndef __CORE_CM35P_H_GENERIC