Update PHP warning suppressions for Clang

Author: rra

Makefile.am

@@ -355,7 +355,9 @@ PHP_WARNINGS = -Wno-strict-prototypes -Wno-write-strings		\
 	-Wno-missing-prototypes -Wno-unused-parameter -Wno-sign-compare	\
 	-Wno-redundant-decls -Wno-old-style-definition -Wno-float-equal	\
 	-Wno-strict-overflow -Wno-conversion -Wno-missing-declarations	\
-	-Wno-double-promotion -Wno-cast-align -Wno-extra-semi-stmt
+	-Wno-double-promotion -Wno-cast-align -Wno-extra-semi-stmt	\
+	-Wno-bad-function-cast -Wno-documentation-unknown-command	\
+	-Wnodeclaration-after-statement -Wno-documentation
 PYTHON_WARNINGS = -Wno-unused-parameter -Wno-strict-aliasing \
 	-Wno-redundant-decls -Wno-cast-align
 RUBY_WARNINGS = -Wno-strict-prototypes -Wno-redundant-decls -Wno-conversion \