Remove extraneous .clang-format files

The .clang-format files in the base, debuggerd, adb, libprocinfo, and
fastboot subdirectories each differ slightly from the top level
.clang-format-2 and .clang-format-4, but not in a substantially
meaningful way, as the source files in those directories have not been
re-formatted with clang-format.  Therefore, let's reduce the
differences and use only the two top level clang-format files.

Secondly perform some small clean-up of the top level .clang-format
files.  AllowShortBlocksOnASingleLine is already false in the Google
style, so it can be removed.  AllowShortFunctionsOnASingleLine should
not change between the -2 and -4 versions, so leave it at the Google
default style in both, which is 'All'.

The diff stats for these changes are:

./base/
Old:
640 insertions(+), 531 deletions(-)
New:
563 insertions(+), 808 deletions(-)

./debuggerd/
Old:
910 insertions(+), 886 deletions(-)
New:
991 insertions(+), 1023 deletions(-)

./adb/
Old:
2623 insertions(+), 2886 deletions(-)
New:
2655 insertions(+), 3103 deletions(-)

./libprocinfo/
Old:
2 insertions(+), 1 deletion(-)
New:
4 insertions(+), 18 deletions(-)

./fastboot/
Old:
618 insertions(+), 743 deletions(-)
New:
726 insertions(+), 882 deletions(-)

./init/
Old:
1755 insertions(+), 1866 deletions(-)
New:
1715 insertions(+), 1952 deletions(-)

Test: Above clang-format stats
Change-Id: I3f7b8ab0660c8394c5008ba95ea15e70dd22b55b

.clang-format-2

@@ -1,8 +1,4 @@
 BasedOnStyle: Google
-AllowShortBlocksOnASingleLine: false
-AllowShortFunctionsOnASingleLine: true
-
-AccessModifierOffset: -1
 ColumnLimit: 100
 CommentPragmas: NOLINT:.*
 DerivePointerAlignment: false

.clang-format-4

@@ -1,7 +1,4 @@
 BasedOnStyle: Google
-AllowShortBlocksOnASingleLine: false
-AllowShortFunctionsOnASingleLine: false
-
 AccessModifierOffset: -2
 ColumnLimit: 100
 CommentPragmas: NOLINT:.*

adb/.clang-format

@@ -0,0 +1 @@
+../.clang-format-4

base/.clang-format

@@ -0,0 +1 @@
+../.clang-format-2

debuggerd/.clang-format

@@ -0,0 +1 @@
+../.clang-format-2

fastboot/.clang-format

@@ -0,0 +1 @@
+../.clang-format-4

libprocinfo/.clang-format

@@ -0,0 +1 @@
+../.clang-format-2