Fix name of libWebKit for newer releases.

Yes, we're now officially using "legacy" WebKit!

build/jam/BuildFeatures

@@ -388,6 +388,7 @@ if $(HAIKU_BUILD_FEATURE_TAGLIB) {
 
 # WebKit
 if [ IsPackageAvailable haikuwebkit_devel ] {
+	if $(TARGET_PACKAGING_ARCH) = x86_64 {
 		ExtractBuildFeatureArchives webkit :
 			file: base haikuwebkit
 				runtime: lib
@@ -397,6 +398,17 @@ if [ IsPackageAvailable haikuwebkit_devel ] {
 					$(developLibDir)/libWebKit.so
 				headers: $(developHeadersDir)
 			;
+	} else {
+		ExtractBuildFeatureArchives webkit :
+			file: base haikuwebkit
+				runtime: lib
+			file: devel haikuwebkit_devel
+				depends: base
+				libraries:
+					$(developLibDir)/libWebKitLegacy.so
+				headers: $(developHeadersDir)
+			;
+	}
 
 	EnableBuildFeatures webkit ;
 } else {