php: add missing bz2 provide.

dev-lang/php/php-5.6.4.recipe

@@ -5,7 +5,7 @@ especially suited to web development.
 Fast, flexible and pragmatic, PHP powers everything from your blog to the most \
 popular websites in the world."
 HOMEPAGE="https://php.net"
-REVISION="2"
+REVISION="3"
 COPYRIGHT="2001-2014 PHP Group"
 LICENSE="PHP License v3.01"
 ARCHITECTURES="x86_gcc2"
@@ -37,6 +37,7 @@ REQUIRES="
 	icu
 	lib:libxml2
 	lib:libz
+	lib:libbz2
 	lib:libssl
 	lib:libcrypto
 	lib:libcurl
@@ -50,6 +51,7 @@ BUILD_REQUIRES="
 	icu_devel
 	devel:libxml2
 	devel:libz
+	devel:libbz2
 	devel:libssl
 	devel:libcrypto
 	devel:libcurl