Makefile: add msvs_common.sh to DIST-SRCS

dist is broken in msvs currently due to a dependency on libs.mk which in
turn depends on the rest of the source tree, not just the examples

Change-Id: I3e313ceeae81eb29ef4bfb099d89756b43583eaa

build/make/Makefile

@@ -411,6 +411,7 @@ ifneq ($(call enabled,DIST-SRCS),)
     DIST-SRCS-$(CONFIG_MSVS)  += build/make/gen_msvs_proj.sh
     DIST-SRCS-$(CONFIG_MSVS)  += build/make/gen_msvs_sln.sh
     DIST-SRCS-$(CONFIG_MSVS)  += build/make/gen_msvs_vcxproj.sh
+    DIST-SRCS-$(CONFIG_MSVS)  += build/make/msvs_common.sh
     DIST-SRCS-$(CONFIG_MSVS)  += build/x86-msvs/obj_int_extract.bat
     DIST-SRCS-$(CONFIG_MSVS)  += build/arm-msvs/obj_int_extract.bat
     DIST-SRCS-$(CONFIG_RVCT) += build/make/armlink_adapter.sh