Revert "disable arm asm build till someone else can fix it properly"

This reverts commit 388ff9375c.

x265.spec

@@ -69,9 +69,6 @@ build() {
     -DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=ON \
     -DCMAKE_SKIP_RPATH:BOOL=YES \
     -DENABLE_PIC:BOOL=ON \
-%ifarch armv7hnl
-    -DENABLE_ASSEMBLY=OFF \
-%endif
     -DENABLE_TESTS:BOOL=ON \
     $* \
     ../source
@@ -139,7 +136,7 @@ done
 
 %changelog
 * Tue Feb 27 2018 Leigh Scott <leigh123linux@googlemail.com> - 2.7-1
-- Update to 2.7
+- update to 2.7
 - Drop shared test patch as it causes nasm build to fail
 - Fix scriptlets
 - Use ninja to build