Fixes for code coverage related flags

Some compile/link flag changes for test coverage metrics (gcov/lcov)
didn't get checked in, so here they are.
diff --git a/configure.ac b/configure.ac
index 1456eb1..060c32d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -451,6 +451,8 @@
     AC_MSG_RESULT(yes)
     CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
     CPPFLAGS="$CPPFLAGS -fprofile-arcs -ftest-coverage"
+    CXXFLAGS="$CXXFLAGS -fprofile-arcs -ftest-coverage"
+    LDFLAGS="$LDFLAGS -lgcov --coverage"
     ;;
   esac ],[
   AC_MSG_RESULT(no)
diff --git a/guththila/configure.ac b/guththila/configure.ac
index da1b141..bba17b2 100644
--- a/guththila/configure.ac
+++ b/guththila/configure.ac
@@ -80,6 +80,7 @@
     AC_MSG_RESULT(yes)
     CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
     CPPFLAGS="$CPPFLAGS -fprofile-arcs -ftest-coverage"
+    CXXFLAGS="$CXXFLAGS -fprofile-arcs -ftest-coverage"
     LDFLAGS="$LDFLAGS -lgcov --coverage"
     ;;
   esac ],[
diff --git a/neethi/configure.ac b/neethi/configure.ac
index a9e9a2e..04d170a 100644
--- a/neethi/configure.ac
+++ b/neethi/configure.ac
@@ -123,6 +123,8 @@
     AC_MSG_RESULT(yes)
     CFLAGS="$CFLAGS -fprofile-arcs -ftest-coverage"
     CPPFLAGS="$CPPFLAGS -fprofile-arcs -ftest-coverage"
+    CXXFLAGS="$CXXFLAGS -fprofile-arcs -ftest-coverage"
+    LDFLAGS="$LDFLAGS -lgcov --coverage"
     ;;
   esac ],[
   AC_MSG_RESULT(no)