autoconf: Fixup EGL build
This gets the needed libraries pulled in for libEGL for autoconf.
diff --git a/configure.ac b/configure.ac
index bc233a7..a57e5b3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -856,6 +856,19 @@
AC_SUBST([OSMESA_PC_LIB_PRIV])
dnl
+dnl EGL configuration
+dnl
+if test "$x11_pkgconfig" = yes; then
+ PKG_CHECK_MODULES([EGL],[x11])
+ EGL_LIB_DEPS="$EGL_LIBS"
+else
+ # should check these...
+ EGL_LIB_DEPS="$X_LIBS -lX11"
+fi
+EGL_LIB_DEPS="$EGL_LIB_DEPS $DLOPEN_LIBS $OS_LIBS"
+AC_SUBST([EGL_LIB_DEPS])
+
+dnl
dnl GLU configuration
dnl
AC_ARG_ENABLE([glu],