make: moved PHONY outside the USE_LCOV conditional

Apparently, automake does not like when there are multiple .PHONY
definitions and some of them are conditionals, it generates a warning:

  Makefile.am:84: warning: .PHONY was already defined in condition USE_LCOV, which is included in condition TRUE ...
  Makefile.am:58: ... '.PHONY' previously defined here

This is probably a false message, because in the end, conditional or not,
the result will not be significantly different, so this patch just moves
the .PHONY definition outside the conditional so Automake will not print
the warning.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>

Makefile.am

@@ -44,6 +44,9 @@ EXTRA_DIST = TODO BUGS BUGFORM FAQ INSTALL \
 	script/generate-txt-from-texi.sh \
 	script/nested-func-to-macro.sh
 
+
+.PHONY:	coverage-reset coverage
+
 if USE_LCOV
 coverage-reset:
 	find . -type f -name '*.gcda' -exec rm -f '{}' ';'
@@ -54,8 +57,6 @@ coverage:
 	-mkdir -p coverage @lcov_output_directory@
 	lcov --compat-libtool --capture --directory . --output-file coverage/coverage.info
 	genhtml --output-directory @lcov_output_directory@ coverage/coverage.info
-
-.PHONY:	coverage-reset coverage
 endif
 
 # make update-lang PO=<lang>