ANDROID: vmlinux.lds.h: Keep .eh_frame with CFI

Specify a placement for the .eh_frame section to avoid orphan section
warnings from the linker.

Bug: 188764690
Change-Id: I34e09b7e7370a36cafaa96644f93b4740c02800f
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>

include/asm-generic/vmlinux.lds.h

@@ -824,12 +824,22 @@
 		*(COMMON)						\
 	}
 
+/*
+ * Keep .eh_frame with CFI.
+ */
+#ifdef CONFIG_CFI_CLANG
+#define EH_FRAME .eh_frame : { *(.eh_frame) }
+#else
+#define EH_FRAME
+#endif
+
 /*
  * DWARF debug sections.
  * Symbols in the DWARF debugging sections are relative to
  * the beginning of the section so we begin them at 0.
  */
 #define DWARF_DEBUG							\
+		EH_FRAME						\
 		/* DWARF 1 */						\
 		.debug          0 : { *(.debug) }			\
 		.line           0 : { *(.line) }			\