[COMMITTERS] pgsql: Add ICU_CFLAGS to global CPPFLAGS

Add ICU_CFLAGS to global CPPFLAGS

The original code only added ICU_CFLAGS to the backend build.  But it is
also needed for building external modules that include pg_locale.h.  So
add it to the global CPPFLAGS.  (This is only relevant if ICU is not in
a compiler default path, so it apparently hasn't bitten many.)

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/94c2ed0ebe005aa6389b02a61e3c16d08035299c

Modified Files
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src/Makefile.global.in        | 2 ++
src/backend/common.mk         | 2 --
src/backend/snowball/Makefile | 3 +--
3 files changed, 3 insertions(+), 4 deletions(-)