utils: Add cmdline_shebang_wrapper util.

Useful to work around shebang relocation issues, where
shebangs are too long or have arguments in them, thus preventing them
from using the /usr/bin/env shebang.

(From OE-Core rev: 6edc1fffcbe1405d8c309a75643d7d6cd9a92848)

Signed-off-by: Paulo Neves <ptsneves@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-selftest/recipes-test/wrapper/cmdline-shebang-wrapper-test.bb

@@ -0,0 +1,21 @@
+SUMMARY = "Check that create_cmdline_shebang works"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
+INHIBIT_DEFAULT_DEPS = "1"
+
+SRC_URI += "file://test.awk"
+
+EXCLUDE_FROM_WORLD = "1"
+do_install() {
+    install -d ${D}${bindir}
+    install -m 0755 ${WORKDIR}/test.awk ${D}${bindir}/test
+    sed -i -e 's|@AWK_BIN@|${bindir}/awk|g' ${D}${bindir}/test
+    create_cmdline_shebang_wrapper ${D}${bindir}/test
+    if [ $(${D}${bindir}/test) != "Don't Panic!" ]; then
+        bbfatal "Wrapper is broken"
+    else
+        bbnote "Wrapper is good"
+    fi
+}
+
+BBCLASSEXTEND = "native"

meta-selftest/recipes-test/wrapper/files/test.awk

@@ -0,0 +1,2 @@
+#! @AWK_BIN@ -f
+BEGIN { print "Don't Panic!" }