Eclipse docs: Prepend IDF paths to beginning of PATH

Avoids problem when a different incompatible make (MSYS1 or other) is already on PATH.

docs/eclipse-setup.rst

@@ -39,7 +39,7 @@ Project Properties
 
 *Windows users only, follow these two additional steps:*
 
-* On the same Environment property page, edit the PATH environment variable and append ``;C:\msys32\usr\bin;C:\msys32\mingw32\bin;C:\msys32\opt\xtensa-esp32-elf\bin`` to the end of the default value. (If you installed msys32 to a different directory then you'll need to change these paths to match.)
+* On the same Environment property page, edit the PATH environment variable and prepend ``C:\msys32\usr\bin;C:\msys32\mingw32\bin;C:\msys32\opt\xtensa-esp32-elf\bin;`` at the **beginning** of the default value. (If you installed msys32 to a different directory then you'll need to change these paths to match.)
 
 * Click on the "C/C++ Build" top-level properties page then uncheck "Use default build command" and enter this for the custom build command: ``bash ${IDF_PATH}/bin/eclipse_windows_make.sh``.