Tell Git to check tab-in-indent and no-lf-at-eof

While at it, remove TABs from indentation in "CMakeLists.txt".

Change-Id: I663afc40f693d61c31992e5d6a47d2ff0d1d506a

.gitattributes

@@ -2,3 +2,12 @@
 
 /GitSetup        export-ignore
 /SetupForDevelopment.sh  export-ignore  eol=lf
+
+*.c              whitespace=tab-in-indent,no-lf-at-eof
+*.h              whitespace=tab-in-indent,no-lf-at-eof
+*.h.in           whitespace=tab-in-indent,no-lf-at-eof
+*.cxx            whitespace=tab-in-indent,no-lf-at-eof
+*.hxx            whitespace=tab-in-indent,no-lf-at-eof
+*.hxx.in         whitespace=tab-in-indent,no-lf-at-eof
+*.txt            whitespace=tab-in-indent,no-lf-at-eof
+*.cmake          whitespace=tab-in-indent,no-lf-at-eof

CMakeLists.txt

@@ -571,7 +571,7 @@ IF(KWSYS_USE_SystemInformation)
     CHECK_INCLUDE_FILES("sys/types.h;ifaddrs.h" KWSYS_SYS_HAS_IFADDRS_H)
     IF(KWSYS_SYS_HAS_IFADDRS_H)
       SET_PROPERTY(SOURCE SystemInformation.cxx APPEND PROPERTY
-	COMPILE_DEFINITIONS KWSYS_SYS_HAS_IFADDRS_H=1)
+        COMPILE_DEFINITIONS KWSYS_SYS_HAS_IFADDRS_H=1)
     ENDIF()
   ENDIF()
   IF(WIN32)
@@ -581,10 +581,10 @@ IF(KWSYS_USE_SystemInformation)
     UNSET(CMAKE_REQUIRED_LIBRARIES)
     IF(KWSYS_SYS_HAS_PSAPI)
       SET_PROPERTY(SOURCE SystemInformation.cxx APPEND PROPERTY
-	COMPILE_DEFINITIONS KWSYS_SYS_HAS_PSAPI=1)
+        COMPILE_DEFINITIONS KWSYS_SYS_HAS_PSAPI=1)
       IF(MSVC70 OR MSVC71)
-	# Suppress LNK4089: all references to 'PSAPI.DLL' discarded by /OPT:REF
-	SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /IGNORE:4089")
+        # Suppress LNK4089: all references to 'PSAPI.DLL' discarded by /OPT:REF
+        SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /IGNORE:4089")
       ENDIF()
     ENDIF()
   ENDIF()