x265: fix building as PIC, needed for ARM

Closes #6868.

srcpkgs/x265/patches/x265-pic.patch

@@ -0,0 +1,11 @@
+--- source/CMakeLists.txt.orig
++++ source/CMakeLists.txt
+@@ -158,7 +162,7 @@ if(GCC)
+     add_definitions(-D__STDC_LIMIT_MACROS=1)
+     add_definitions(-std=gnu++98)
+     if(ENABLE_PIC)
+-         add_definitions(-fPIC)
++         add_definitions(-fPIC -DPIC)
+     endif(ENABLE_PIC)
+     if(NATIVE_BUILD)
+         if(INTEL_CXX)

srcpkgs/x265/template

@@ -1,10 +1,11 @@
 # Template file for 'x265'
 pkgname=x265
 version=2.4
-revision=1
+revision=2
 build_style=cmake
 build_wrksrc="source"
 wrksrc="x265_${version}"
+configure_args="-DENABLE_PIC=1"
 hostmakedepends="yasm"
 short_desc="Open Source H.265/HEVC video encoder"
 maintainer="Juan RP <xtraeme@voidlinux.eu>"