build: Remve the unnecessary .gitignore

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

.gitignore

@@ -1,35 +1,46 @@
-.depend
-Make.dep
-*.o
 *.a
+*.adb
+*.asm
+*.bin
 *.d
+*.dSYM
+*.elf
+*.exe
+*.hex
 *.i
+*.ihx
+*.lib
+*.lod
+*.lst
+*.map
+*.o
+*.obj
+*.rel
+*.src
+*.srec
+*.swp
+*.sym
+*.wsp
 *~
-.swp
-.*.swp
-core
-uImage
-/.gdbinit
-/cscope.*
+.depend
 /.config
-/.config-e
 /.config.old
+/.config-e
+/.cproject
+/.gdbinit
+/.project
 /.version
+/_SAVED_APPS_config
+/cscope.*
 /defconfig
 /defconfig.tmp-e
 /Make.defs
-/staging
 /nuttx
-/nuttx.*
 /nuttx-*
-/_SAVED_APPS_config
-/*.map
-/*.elf
-/*.srec
-/*.bin
-/*.ihx
-/*.hex
-/.cproject
-/.project
+/nuttx.*
+/staging
 /tags
 /TAGS
+core
+Make*.dep
+uImage