HOSTDEV-1655 overring pkg-config with compiler and linker flags for nettle, hogweed, tasn and gmp
HOSTDEV-1585 building libxslt without crypto since we're building libgcrypt anyway
Added lib64 install paths for gettext on redhat

(cherry picked from commit 24ea12840a02eda12d1bb5176ef9fe9724f0064b)
Signed-off-by: Guy Rozendorn <guy@rzn.co.il>
Issue #2: openssl ignores LDFLAGS, and therefore has an rpath that does not contain $ORIGIN/../lib
Issue #3: purge_sysconfigdata: using Python2.6-compatible string formatting
TRIVIAL updated README
gettext fails to build on CentOS-7

gcc -static-libgcc -fPIC -DHAVE_CONFIG_H -DEXEEXT=\"\" -I. -I..  -I../intl -I../intl -DDEPENDS_ON_LIBICONV=1 -DDEPENDS_ON_LIBINTL=1 -I/root/relocatable-python/dist/include  -I/root/relocatable-python/dist/include -c -o closeout.o closeout.c
In file included from closeout.c:22:0:
./stdio.h:456:1: error: ‘gets’ undeclared here (not in a function)
 _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
libgnutls fails to build on CentOS-7

make[6]: Entering directory `/root/relocatable-python/parts/libgnutls__compile__/gnutls-2.12.3/lib/gl'
  CC     c-ctype.lo
  CC     close-hook.lo
  CC     sockets.lo
  CC     asnprintf.lo
  CC     printf-args.lo
  CC     printf-parse.lo
  CC     read-file.lo
In file included from read-file.h:26:0,
                 from read-file.c:21:
./stdio.h:477:1: error: 'gets' undeclared here (not in a function)
 _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
Finished release v2.7.6.11.

* release/v2.7.6.11:
  libgnutls fails to build on CentOS-7
  gettext fails to build on CentOS-7
  TRIVIAL updated README
  Issue #3: purge_sysconfigdata: using Python2.6-compatible string formatting
  Issue #2: openssl ignores LDFLAGS, and therefore has an rpath that does not contain $ORIGIN/../lib
  Added lib64 install paths for gettext on redhat
  HOSTDEV-1585 building libxslt without crypto since we're building libgcrypt anyway
  HOSTDEV-1655 overring pkg-config with compiler and linker flags for nettle, hogweed, tasn and gmp