Fix x264 on AArch64. quant-a.S and deblock-a.S have syntax the LLVM

assembler complains about. Pull in two upstream changes to fix these until
they are on the stable branch.

Without these these ports fail to build on AArch64.

Approved by:	koobs
Differential Revision:	https://reviews.freebsd.org/D4781

multimedia/x264/files/patch-deblock-a.S

@@ -0,0 +1,20 @@
+--- common/aarch64/deblock-a.S.orig	2016-01-04 11:21:40.265233000 +0000
++++ common/aarch64/deblock-a.S	2016-01-04 11:27:19.291080000 +0000
+@@ -538,7 +538,7 @@
+     ret
+ endfunc
+ 
+-.macro h264_loop_filter_chroma_intra, width=16
++.macro h264_loop_filter_chroma_intra width=16
+     uabd            v26.16b, v16.16b, v17.16b  // abs(p0 - q0)
+     uabd            v27.16b, v18.16b, v16.16b  // abs(p1 - p0)
+     uabd            v28.16b, v19.16b, v17.16b  // abs(q1 - q0)
+@@ -604,7 +604,7 @@
+ 
+     transpose4x4.h  v18, v16, v17, v19, v26, v27, v28, v29
+ 
+-    h264_loop_filter_chroma_intra, width=8
++    h264_loop_filter_chroma_intra width=8
+ 
+     st2             {v16.h,v17.h}[0], [x0], x1
+     st2             {v16.h,v17.h}[1], [x0], x1

multimedia/x264/files/patch-quant-a.S

@@ -0,0 +1,24 @@
+--- common/aarch64/quant-a.S.orig	2016-01-04 11:28:55.378084000 +0000
++++ common/aarch64/quant-a.S	2016-01-04 11:30:55.055050000 +0000
+@@ -546,12 +546,10 @@
+     sub         x0,  x0,  #2
+ .endif
+ .if         \size < 15
+-    .equ        shiftw, 3
+     ld1         {v0.8h}, [x0]
+     uqxtn       v0.8b,  v0.8h
+     cmtst       v0.8b,  v0.8b,  v0.8b
+ .else
+-    .equ        shiftw, 2
+     ld1         {v0.8h,v1.8h}, [x0]
+     uqxtn       v0.8b,  v0.8h
+     uqxtn2      v0.16b, v1.8h
+@@ -565,7 +563,7 @@
+ 
+     coeff_level_run_start \size
+ 
+-    coeff_level_run shiftw
++    coeff_level_run (4 - (\size + 1) / 8)
+ 
+     ret
+ endfunc