Fixes common_unittests build.

Original CL: https://breakpad.appspot.com/5704002/
A=gunsch@chromium.org
R=gunsch@chromium.org

Review URL: https://breakpad.appspot.com/8674002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1378 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/common/common.gyp

@@ -235,6 +235,9 @@
         '../build/testing.gypi:gmock',
         '../build/testing.gypi:gtest',
       ],
+      'libraries': [
+        '-ldl',
+      ],
     },
   ],
 }

src/common/linux/google_crashdump_uploader.h

@@ -28,6 +28,9 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
+#ifndef COMMON_LINUX_GOOGLE_CRASHDUMP_UPLOADER_H_
+#define COMMON_LINUX_GOOGLE_CRASHDUMP_UPLOADER_H_
+
 #include <string>
 #include <map>
 
@@ -98,3 +101,5 @@ class GoogleCrashdumpUploader {
   std::map<string, string> parameters_;
 };
 }
+
+#endif  // COMMON_LINUX_GOOGLE_CRASHDUMP_UPLOADER_H_

src/common/linux/libcurl_wrapper.h

@@ -30,6 +30,9 @@
 // A wrapper for libcurl to do HTTP Uploads, to support easy mocking
 // and unit testing of the HTTPUpload class.
 
+#ifndef COMMON_LINUX_LIBCURL_WRAPPER_H_
+#define COMMON_LINUX_LIBCURL_WRAPPER_H_
+
 #include <string>
 #include <map>
 
@@ -83,3 +86,5 @@ class LibcurlWrapper {
 
 };
 }
+
+#endif  // COMMON_LINUX_LIBCURL_WRAPPER_H_