package/Makefile.in: set variables for legacy f77 checks

For fortran detection, some projects check for fortran availability
using the FC/FCFLAGS variables, and others for the legacy F77/FFLAGS
ones.
So, make sure the legacy fortran F77 and FFLAGS variables are set in
TARGET_CONFIGURE_OPTS.

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Makefile.in

@@ -250,6 +250,7 @@ TARGET_CONFIGURE_OPTS = \
 	CPP="$(TARGET_CPP)" \
 	CXX="$(TARGET_CXX)" \
 	FC="$(TARGET_FC)" \
+	F77="$(TARGET_FC)" \
 	RANLIB="$(TARGET_RANLIB)" \
 	READELF="$(TARGET_READELF)" \
 	STRIP="$(TARGET_STRIP)" \
@@ -273,6 +274,7 @@ TARGET_CONFIGURE_OPTS = \
 	CXXFLAGS="$(TARGET_CXXFLAGS)" \
 	LDFLAGS="$(TARGET_LDFLAGS)" \
 	FCFLAGS="$(TARGET_FCFLAGS)" \
+	FFLAGS="$(TARGET_FCFLAGS)" \
 	PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
 	STAGING_DIR="$(STAGING_DIR)" \
 	INTLTOOL_PERL=$(PERL)