Add additional search paths for glog & Eigen on Windows.

- When built with CMake on Windows, the default install prefix
  will be C:/Program Files/<PROJECT_NAME> (instead of /usr/local on
  Linux / OS X.
- Due to an upstream change in Eigen >= 3.3, the project name for Eigen
  changed to Eigen3 from Eigen, thus changing the default install
  location.
- glog, uses the project name “google-glog”, thus when it is build with
  CMake, this becomes it’s default install path instead of just glog
  when built with other tools.
- This patch adds both of these paths to the default search list on
  Windows.

Change-Id: I987b502fed0f6e685c504fd47fd504307aad8bef

cmake/FindEigen.cmake

@@ -91,8 +91,6 @@ unset(EIGEN_FOUND)
 
 # Search user-installed locations first, so that we prefer user installs
 # to system installs where both exist.
-#
-# TODO: Add standard Windows search locations for Eigen.
 list(APPEND EIGEN_CHECK_INCLUDE_DIRS
   /usr/local/include
   /usr/local/homebrew/include # Mac OS X
@@ -102,7 +100,8 @@ list(APPEND EIGEN_CHECK_INCLUDE_DIRS
 # Additional suffixes to try appending to each search path.
 list(APPEND EIGEN_CHECK_PATH_SUFFIXES
   eigen3 # Default root directory for Eigen.
-  Eigen/include/eigen3 ) # Windows (for C:/Program Files prefix).
+  Eigen/include/eigen3 # Windows (for C:/Program Files prefix) < 3.3
+  Eigen3/include/eigen3 ) # Windows (for C:/Program Files prefix) >= 3.3
 
 # Search supplied hint directories first if supplied.
 find_path(EIGEN_INCLUDE_DIR

cmake/FindGlog.cmake

@@ -225,7 +225,9 @@ if (NOT GLOG_FOUND)
     glog/include
     glog/Include
     Glog/include
-    Glog/Include)
+    Glog/Include
+    google-glog/include # CMake installs with project name prefix.
+    google-glog/Include)
 
   list(APPEND GLOG_CHECK_LIBRARY_DIRS
     /usr/local/lib
@@ -237,7 +239,9 @@ if (NOT GLOG_FOUND)
     glog/lib
     glog/Lib
     Glog/lib
-    Glog/Lib)
+    Glog/Lib
+    google-glog/lib # CMake installs with project name prefix.
+    google-glog/Lib)
 
   # Search supplied hint directories first if supplied.
   find_path(GLOG_INCLUDE_DIR