Contribs: Fix libmpcdec configure.ac

You need a compiler.
(cherry picked from commit a8d24bd4)
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

extras/contrib/src/Patches/mpcdec.patch

 --- mpcdec/configure.ac	2007-04-17 21:05:32.000000000 +0200
 +++ mpcdec/configure.ac	2007-09-06 23:52:09.000000000 +0200
+@@ -8,6 +8,9 @@
+ 
+ CFLAGS="$CFLAGS -O3 -fomit-frame-pointer -fPIC"
+ 
++AC_PROG_CC
++AC_PROG_CXX
++
+ AC_C_BIGENDIAN(,CFLAGS="$CFLAGS -DMPC_LITTLE_ENDIAN",)
+ 
+ AC_HEADER_STDC
 @@ -58,10 +58,15 @@
  	ac_cv_c_int64_t=int64_t
  fi