Add minimalistic HMAC_DRBG implementation

(copied from ECDSA)
diff --git a/visualc/VS2010/PolarSSL.vcxproj b/visualc/VS2010/PolarSSL.vcxproj
index 127d106..84beb62 100644
--- a/visualc/VS2010/PolarSSL.vcxproj
+++ b/visualc/VS2010/PolarSSL.vcxproj
@@ -168,6 +168,7 @@
     <ClInclude Include="..\..\include\polarssl\error.h" />

     <ClInclude Include="..\..\include\polarssl\gcm.h" />

     <ClInclude Include="..\..\include\polarssl\havege.h" />

+    <ClInclude Include="..\..\include\polarssl\hmac_drbg.h" />
     <ClInclude Include="..\..\include\polarssl\md2.h" />

     <ClInclude Include="..\..\include\polarssl\md4.h" />

     <ClInclude Include="..\..\include\polarssl\md5.h" />

@@ -227,6 +228,7 @@
     <ClCompile Include="..\..\library\error.c" />

     <ClCompile Include="..\..\library\gcm.c" />

     <ClCompile Include="..\..\library\havege.c" />

+    <ClCompile Include="..\..\library\hmac_drbg.c" />
     <ClCompile Include="..\..\library\md2.c" />

     <ClCompile Include="..\..\library\md4.c" />

     <ClCompile Include="..\..\library\md5.c" />

diff --git a/visualc/VS6/polarssl.dsp b/visualc/VS6/polarssl.dsp
index 645b29c..f763caa 100644
--- a/visualc/VS6/polarssl.dsp
+++ b/visualc/VS6/polarssl.dsp
@@ -185,6 +185,10 @@
 # End Source File

 # Begin Source File

 

+SOURCE=..\..\library\hmac_drbg.c
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\library\md2.c

 # End Source File

 # Begin Source File

@@ -457,6 +461,10 @@
 # End Source File

 # Begin Source File

 

+SOURCE=..\..\include\polarssl\hmac_drbg.h
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\include\polarssl\md2.h

 # End Source File

 # Begin Source File