libx86-1: don't inherit autotools

This upstream does not in fact use autotools, so remove the inherit and
implement the required do_install directly.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-extended/libx86-1/libx86-1_1.1.bb

@@ -24,4 +24,6 @@ COMPATIBLE_HOST = '(x86_64|i.86).*-linux'
 export LIBDIR = "${libdir}"
 export BACKEND = "x86emu"
 
-inherit autotools-brokensep
+do_install() {
+    oe_runmake 'DESTDIR=${D}' install
+}