Fix incorrect adding .h in bgfx_compile_shaders (#245)

cmake/bgfxToolUtils.cmake

@@ -603,7 +603,10 @@ if(TARGET bgfx::shaderc)
 			set(MKDIR_COMMANDS "")
 			foreach(PROFILE ${PROFILES})
 				_bgfx_get_profile_ext(${PROFILE} PROFILE_EXT)
-				set(OUTPUT ${ARGS_OUTPUT_DIR}/${PROFILE_EXT}/${SHADER_FILE_BASENAME}.bin$<$<BOOL:ARGS_AS_HEADERS>:.h>)
+				if(ARGS_AS_HEADERS)
+					set(HEADER_PREFIX .h)
+				endif()
+				set(OUTPUT ${ARGS_OUTPUT_DIR}/${PROFILE_EXT}/${SHADER_FILE_BASENAME}.bin${HEADER_PREFIX})
 				set(PLATFORM_I ${PLATFORM})
 				if(PROFILE STREQUAL "spirv")
 					set(PLATFORM_I LINUX)