Adding OmxCore_headers lib

This is to prepare for removing copy headers in libOmxCore and replace
it with export dirs. Few modules in internal master need this CL
separately before the switch can happen

Bug: 33241851
Test: compile sailfish or marlin targets
Change-Id: Ib0c5d9774bf4cfee74485d02fdf83ef6cfd399c9
diff --git a/msm8996/mm-core/Android.mk b/msm8996/mm-core/Android.mk
index 26e7e31..b658ca9 100644
--- a/msm8996/mm-core/Android.mk
+++ b/msm8996/mm-core/Android.mk
@@ -107,6 +107,11 @@
 
 include $(BUILD_SHARED_LIBRARY)
 
+include $(CLEAR_VARS)
+LOCAL_MODULE := OmxCore_headers
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/inc
+include $(BUILD_HEADER_LIBRARY)
+
 #===============================================================================
 #             LIBRARY for command line test apps
 #===============================================================================