add busybox and dropbeat initrd patch and add eit remove for old kernels

sys-kernel/recoveryinitramfs/files/busybox/1.20.2/004_all_busybox-1.7.4-signal-hack.patch

@@ -0,0 +1,28 @@
+workaround while we get it fixed upstream
+
+http://bugs.gentoo.org/201114
+
+--- libbb/u_signal_names.c
++++ libbb/u_signal_names.c
+@@ -66,7 +66,7 @@
+ #ifdef SIGTERM
+ 	[SIGTERM  ] = "TERM",
+ #endif
+-#ifdef SIGSTKFLT
++#if defined(SIGSTKFLT) && SIGSTKFLT < 32
+ 	[SIGSTKFLT] = "STKFLT",
+ #endif
+ #ifdef SIGCHLD
+@@ -90,10 +90,10 @
+ #ifdef SIGURG
+ 	[SIGURG   ] = "URG",
+ #endif
+-#ifdef SIGXCPU
++#if defined(SIGXCPU) && SIGXCPU < 32
+ 	[SIGXCPU  ] = "XCPU",
+ #endif
+-#ifdef SIGXFSZ
++#if defined(SIGXFSZ) && SIGXFSZ < 32
+ 	[SIGXFSZ  ] = "XFSZ",
+ #endif
+ #ifdef SIGVTALRM