small doc fixes (#700)

doc/embed_wamr.md: WASMModuleInstanceCommon -> wasm_module_inst_t
wamr-sdk/README.md: fix a link

doc/embed_wamr.md

@@ -200,7 +200,7 @@ wasm_runtime_module_malloc(wasm_module_inst_t module_inst,
  * size: the size of buffer to be allocated and copy data
  */
 uint32_t
-wasm_runtime_module_dup_data(WASMModuleInstanceCommon *module_inst,
+wasm_runtime_module_dup_data(wasm_module_inst_t module_inst,
                              const char *src, uint32_t size);
 
 /* free the memory allocated from module memory space */

wamr-sdk/README.md

@@ -84,7 +84,7 @@ The folder “**app-sdk**” under the profile output directory contains all the
 
 
 
-Refer to [build WASM applications](./doc/build_wasm_app.md) for the details.
+Refer to [build WASM applications](../doc/build_wasm_app.md) for the details.