Apply CRC regen to GCC 4.7

CRC generated table is regenerated using the same method as GCC 10.

Closes #243

sysa/SHA256SUMS.pkgs

@@ -54,7 +54,7 @@ f55c11b091361536774b436abe86b17f759cd7a66522cd20c7a2190da92db67a  findutils-4.2.
 4ab9a66ad64fb2b989eac3eaca338ae56ed13c4742031a2174b1d22da519e5b9  gcc-10.4.0_0.tar.bz2
 ebbc144e18ca908295845c707f10df82a3337732cc167fcc251b6e6c508d454e  gcc-4.0.4_0.tar.bz2
 5d3d9bae0069fd4388392b91a47bba4d7ce6733ca9075742ef0d4a4cab899803  gcc-4.0.4_1.tar.bz2
-ef44ca57e0b263bc4caae7c375af8930b4e3cf0c58fec98092678d622e37a4a6  gcc-4.7.4_0.tar.bz2
+7c0ffdd42e955fcf8843df6cfca312bbb0fbb355d0f5c81c943124a8379d4b56  gcc-4.7.4_0.tar.bz2
 99891d9413e7d3923bd1466d1bb24fdad5c0b41735a4b614d4029ec9512df0c9  gettext-0.21_0.tar.bz2
 8906ece680934b78ea0fb5f950595b6480b8fbd06481039547ec7a370cb6e6bf  gmp-6.2.1_0.tar.bz2
 d39ef0324c447d4a2a2caba235dd56ef4931f467fe688fd222b08febc7a07d2a  gperf-3.1_0.tar.bz2

sysc/gcc-4.7.4/gcc-4.7.4.sh

@@ -81,6 +81,16 @@ src_prepare() {
     # Rebuild flex generated files
     rm gcc/gengtype-lex.c
 
+    # Regenerate crc table in libiberty/crc32.c
+    pushd libiberty
+    sed -n -e '39,66p' crc32.c > crcgen.c
+    gcc -o crcgen crcgen.c
+    head -n 70 crc32.c > crc32.c.new
+    ./crcgen >> crc32.c.new
+    tail -n +139 crc32.c >> crc32.c.new
+    mv crc32.c.new crc32.c
+    popd
+
     # Remove translation catalogs
     find . -name '*.gmo' -delete