Neon/AArch64: Don't put GAS functions in .rodata

Regression introduced by 240ba41

Closes #546

CMakeLists.txt

@@ -5,7 +5,7 @@ if(CMAKE_EXECUTABLE_SUFFIX)
 endif()
 
 project(libjpeg-turbo C)
-set(VERSION 2.1.1)
+set(VERSION 2.1.2)
 string(REPLACE "." ";" VERSION_TRIPLET ${VERSION})
 list(GET VERSION_TRIPLET 0 VERSION_MAJOR)
 list(GET VERSION_TRIPLET 1 VERSION_MINOR)

ChangeLog.md

@@ -1,3 +1,15 @@
+2.1.2
+=====
+
+1. Fixed a regression introduced by 2.1 beta1[13] that caused the remaining
+GAS implementations of AArch64 (Arm 64-bit) Neon SIMD functions (which are used
+by default with GCC for performance reasons) to be placed in the `.rodata`
+section rather than in the `.text` section.  This caused the GNU linker to
+automatically place the `.rodata` section in an executable segment, which
+prevented libjpeg-turbo from working properly with other linkers and also
+represented a potential security risk.
+
+
 2.1.1
 =====
 

simd/arm/aarch64/jsimd_neon.S

@@ -182,6 +182,8 @@ Ljsimd_huff_encode_one_block_neon_consts:
     .byte    4,   5,   6,   7, 255, 255, 255, 255, \
            255, 255, 255, 255, 255, 255, 255, 255  /* L7 : 1 line OK */
 
+.text
+
 
 /*****************************************************************************/