[docs] fix lmdb fetch url and path

docs/install_apt.md

@@ -42,7 +42,7 @@ These dependencies need manual installation in 12.04.
     make && make install
     # lmdb
     git clone https://github.com/LMDB/lmdb
-    cd mdb/libraries/liblmdb
+    cd lmdb/libraries/liblmdb
     make && make install
 
 Note that glog does not compile with the most recent gflags version (2.1), so before that is resolved you will need to build with glog first.

docs/install_yum.md

@@ -28,8 +28,8 @@ title: Installation: RHEL / Fedora / CentOS
     export CXXFLAGS="-fPIC" && cmake .. && make VERBOSE=1
     make && make install
     # lmdb
-    git clone git://gitorious.org/mdb/mdb.git
-    cd mdb/libraries/liblmdb
+    git clone https://github.com/LMDB/lmdb
+    cd lmdb/libraries/liblmdb
     make && make install
 
 Note that glog does not compile with the most recent gflags version (2.1), so before that is resolved you will need to build with glog first.