pgsql: Fix parallel make when running make install before make all

Fix parallel make when running make install before make all

In addition to the

all-foo-recurse: all-bar-recurse

dependencies that constraint the order of the rule execution, we need

install-foo-recurse: install-bar-recurse

dependencies in case one runs make install without a make all first,
as some people apparently do.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/4502c8e1c06164adb7be526096e91e04d1844d36

Modified Files
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src/interfaces/Makefile      |    1 +
src/interfaces/ecpg/Makefile |    2 ++
2 files changed, 3 insertions(+), 0 deletions(-)