fortran-helloworld: add a very dumb Fortran Hello World for testing

For future runtime testing something more complex is preferred but this is
sufficient to exercise the cross compiler.

(From OE-Core rev: 7d5f39ca717fa1caea357a4366bbf106386432c0)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-selftest/recipes-test/fortran/files/hello.f95

@@ -0,0 +1,5 @@
+program helloworld
+
+      print * , "Hello World!"
+
+end program helloworld

meta-selftest/recipes-test/fortran/fortran-helloworld.bb

@@ -0,0 +1,25 @@
+SUMMARY = "Fortran Hello World"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+
+DEPENDS = "libgfortran"
+
+SRC_URI = "file://hello.f95"
+
+# These set flags that Fortran doesn't support
+SECURITY_CFLAGS = ""
+SECURITY_LDFLAGS = ""
+
+do_compile() {
+	${HOST_PREFIX}gfortran ${HOST_CC_ARCH}${TOOLCHAIN_OPTIONS} ${LDFLAGS} ${WORKDIR}/hello.f95 -o ${B}/fortran-hello
+}
+
+do_install() {
+	install -d ${D}${bindir}
+	install ${B}/fortran-hello ${D}${bindir}
+}
+
+python () {
+    if not d.getVar("FORTRAN"):
+        raise bb.parse.SkipRecipe("Fortran isn't enabled")
+}