.clang-format: update to 3.8.1

based on --style=Google with the following differences:
3a4
> # Generated with clang-format 3.8.1
13c14
< AllowShortCaseLabelsOnASingleLine: false
---
> AllowShortCaseLabelsOnASingleLine: true
41c42
< ConstructorInitializerAllOnOneLineOrOnePerLine: true
---
> ConstructorInitializerAllOnOneLineOrOnePerLine: false
44,45c45,46
< Cpp11BracedListStyle: true
< DerivePointerAlignment: true
---
> Cpp11BracedListStyle: false
> DerivePointerAlignment: false
73c74
< PointerAlignment: Left
---
> PointerAlignment: Right
75c76
< SortIncludes:    true
---
> SortIncludes:    false

SortIncludes will like be enabled in a future commit

Change-Id: I34cb20b99d2d988681e0cd0e74d03b3668ae0031

.clang-format

 ---
 Language:        Cpp
 # BasedOnStyle:  Google
-# Generated with clang-format 3.7.1
+# Generated with clang-format 3.8.1
 AccessModifierOffset: -1
-AlignAfterOpenBracket: true
+AlignAfterOpenBracket: Align
 AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
 AlignEscapedNewlinesLeft: true
 AlignOperands:   true
 AlignTrailingComments: true
@@ -15,10 +16,23 @@ AllowShortFunctionsOnASingleLine: All
 AllowShortIfStatementsOnASingleLine: true
 AllowShortLoopsOnASingleLine: true
 AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
 AlwaysBreakBeforeMultilineStrings: true
 AlwaysBreakTemplateDeclarations: true
 BinPackArguments: true
 BinPackParameters: true
+BraceWrapping:
+  AfterClass:      false
+  AfterControlStatement: false
+  AfterEnum:       false
+  AfterFunction:   false
+  AfterNamespace:  false
+  AfterObjCDeclaration: false
+  AfterStruct:     false
+  AfterUnion:      false
+  BeforeCatch:     false
+  BeforeElse:      false
+  IndentBraces:    false
 BreakBeforeBinaryOperators: None
 BreakBeforeBraces: Attach
 BreakBeforeTernaryOperators: true
@@ -33,6 +47,13 @@ DerivePointerAlignment: false
 DisableFormat:   false
 ExperimentalAutoDetectBinPacking: false
 ForEachMacros:   [ foreach, Q_FOREACH, BOOST_FOREACH ]
+IncludeCategories:
+  - Regex:           '^<.*\.h>'
+    Priority:        1
+  - Regex:           '^<.*'
+    Priority:        2
+  - Regex:           '.*'
+    Priority:        3
 IndentCaseLabels: true
 IndentWidth:     2
 IndentWrappedFunctionNames: false
@@ -51,6 +72,8 @@ PenaltyBreakString: 1000
 PenaltyExcessCharacter: 1000000
 PenaltyReturnTypeOnItsOwnLine: 200
 PointerAlignment: Right
+ReflowComments:  true
+SortIncludes:    false
 SpaceAfterCStyleCast: false
 SpaceBeforeAssignmentOperators: true
 SpaceBeforeParens: ControlStatements