add .gitignore files

.gitignore

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+#
+# NOTE! Don't add files that are generated in specific
+# subdirectories here. Add them in the ".gitignore" file
+# in that subdirectory instead.
+#
+# Normal rules
+#
+.*
+*.o
+*.a
+*.s
+*.ko
+*.so
+*.mod.c
+*.i
+*.lst
+*.symtypes
+
+#
+# Top-level generic files
+#
+tags
+TAGS
+cross_arch
+cross_compile
+uboot*
+System.map
+Module.symvers
+
+#
+# Generated include files
+#
+include/asm
+include/asm-*/asm-offsets.h
+include/config
+include/linux/autoconf.h
+include/linux/compile.h
+include/linux/version.h
+include/linux/utsrelease.h
+
+# stgit generated dirs
+patches-*
+
+# quilt's files
+patches
+series
+
+# cscope files
+cscope.*

include/.gitignore

@@ -0,0 +1 @@
+config.h

include/asm-ppc/.gitignore

@@ -0,0 +1 @@
+arch

scripts/.gitignore

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+ubootenv
+bin2c

scripts/basic/.gitignore

@@ -0,0 +1,2 @@
+docproc
+fixdep

scripts/kconfig/.gitignore

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+#
+# Generated files
+#
+config*
+lex.*.c
+*.tab.c
+*.tab.h
+zconf.hash.c
+*.moc
+lkc_defs.h
+
+#
+# configuration programs
+#
+conf
+mconf
+qconf
+gconf
+kxgettext