Remove boost .a from linker path (#7862)

Author: dimitre

libs/openFrameworksCompiled/project/osx/config.osx.default.mk

@@ -226,7 +226,7 @@ PLATFORM_CORE_EXCLUSIONS += $(OF_LIBS_PATH)/openFrameworks/app/ofAppEGLWindow.cp
 
 
 # third party
-PLATFORM_CORE_EXCLUSIONS += $(OF_LIBS_PATH)/boost/include/boost/%
+PLATFORM_CORE_EXCLUSIONS += $(OF_LIBS_PATH)/boost/%
 
 
 ifeq ($(USE_FMOD),0)