Updates in preparation for package sync on gcc2h.

build/jam/ArchitectureRules

@@ -155,6 +155,7 @@ rule ArchitectureSetup architecture
 
 	if $(HAIKU_CC_IS_LEGACY_GCC_$(architecture)) = 1 {
 		HAIKU_DEFINES_$(architecture) += _BEOS_R5_COMPATIBLE_ ;
+		HAIKU_WERROR_FLAGS_$(architecture) += -Wno-unknown-pragmas ;
 	}
 
 	# private shared kernel/libroot headers

build/jam/OptionalPackages

@@ -129,8 +129,8 @@ if [ IsOptionalHaikuImagePackageAdded DevelopmentMin ]
 
 # Git
 if [ IsOptionalHaikuImagePackageAdded Git ] {
-	AddHaikuImageSystemPackages git git_daemon perl ;
-	AddHaikuImageSourcePackages git ;
+	AddHaikuImageSystemPackages git@!gcc2 git_x86@secondary_x86 ;
+	AddHaikuImageSourcePackages git@!gcc2 git_x86@secondary_x86 ;
 }