Fix the README.md file.

Change-Id: I9fe3a9dd7e5274509fcbab9cb54ae16d5d2e2310

README.md

@@ -91,15 +91,15 @@ named "x64" under the RGA executable's directory (for example, D3DCompiler_47.dl
 
    cd to the Build sub-folder, and run:
 
-   prebuild.bat --build release (or: debug)
+   prebuild.sh --build release (or: debug)
 
    This will fetch all the dependencies, and generate the makefiles.
 
    Then, cd to the auto-generated subfolder Build/CMake/linux and run make.
 
    -=-
 
-   If for some reason you do not want to use the prebuild.bat script, you can also manually fetch the dependencies and generate the makefiles:
+   If for some reason you do not want to use the prebuild.sh script, you can also manually fetch the dependencies and generate the makefiles:
 
   * run: fetch_dependencies.py
   * run: cmake –DCMAKE_BUILD_TYPE=Release (or: Debug) <full or relative path to the RGA repo directory>
@@ -152,13 +152,13 @@ cd to the Build sub-folder, and run:
   * run: fetch_dependencies.py
   * run: cmake –DCMAKE_BUILD_TYPE=Release (or: Debug) <full or relative path to the RGA repo directory>
 
-	It is recommended to create a directory to hold all build files, and launch cmake from that directory.
-	
-	For example:
-	* cd to the RGA repo directory
-	* mkdir _build
-	* cd _build
-	* cmake –DCMAKE_BUILD_TYPE=Release ../
+    It is recommended to create a directory to hold all build files, and launch cmake from that directory.
+
+    For example:
+    * cd to the RGA repo directory
+    * mkdir _build
+    * cd _build
+    * cmake –DCMAKE_BUILD_TYPE=Release ../
   * run: make
 
 ## Running ##