remove obsolete SuperH support

We don't have a toolchain anymore, we don't have working original
kernel headers, and nobody is maintaining this so there is really
no point in keeping this here. Details of the patch:

- removed code paths from Android.mk files related to the SuperH
  architecture ("sh")

- removed libc/arch-sh, linker/arch-sh, libc/kernel/arch-sh

- simplified libc/SYSCALLS.TXT

- simplified the scripts in libc/tools/ and libc/kernel/tools

Change-Id: I26b0e1422bdc347489e4573e2fbec0e402f75560

Signed-off-by: David 'Digit' Turner <digit@android.com>
diff --git a/libm/Android.mk b/libm/Android.mk
index 29c75a2..57e4d4c 100644
--- a/libm/Android.mk
+++ b/libm/Android.mk
@@ -173,17 +173,7 @@
 
     libm_common_includes = $(LOCAL_PATH)/i386 $(LOCAL_PATH)/i387
   else
-    ifeq ($(TARGET_OS)-$(TARGET_ARCH),linux-sh)
-      libm_common_src_files += \
-		sh/fenv.c \
-		src/s_scalbln.c \
-		src/s_scalbn.c \
-		src/s_scalbnf.c
-
-      libm_common_includes = $(LOCAL_PATH)/sh
-    else
-      $(error "Unknown architecture")
-    endif
+    $(error "Unknown architecture")
   endif
 endif