This patch adds OpenMP flags to the command used to link the shared library.
OpenMP is used by the wagon tool since speech-tools-2.5. It is used in the libestools
shared library. dpkg-shlibdeps reports missing OpenMP symbols if the shared library is not
linked with OpenMP options.

Author: Sergio Oller <sergioller@gmail.com>
Last update: 2018-06-30
--- a/config/compilers/gcc_defaults.mak
+++ b/config/compilers/gcc_defaults.mak
@@ -84,7 +84,7 @@
 ifndef GCC_MAKE_SHARED_LIB
 # Older versions of gcc might have required -fno-shared-data
 #    MAKE_SHARED_LIB = $(CXX) -shared -fno-shared-data -o XXX
-    MAKE_SHARED_LIB = $(CXX) -shared -o XXX -Wl,-soname -Wl,YYY $(USER_LINKFLAGS)
+    MAKE_SHARED_LIB = $(CXX) $(OMP_OPTS) -shared -o XXX -Wl,-soname -Wl,YYY $(USER_LINKFLAGS)
 else
     MAKE_SHARED_LIB = $(GCC_MAKE_SHARED_LIB)
 endif