Fix minor typos in platform-*.cc

src/platform-linux.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
 //
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 //       notice, this list of conditions and the following disclaimer.
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 //       with the distribution.
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 //       from this software without specific prior written permission.
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 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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-// Platform specific code for Linux goes here. For the POSIX comaptible parts
-// the implementation is in platform-posix.cc.
+// Platform-specific code for Linux goes here. For the POSIX-compatible
+// parts, the implementation is in platform-posix.cc.
 
 #include <pthread.h>
 #include <semaphore.h>
 #include <signal.h>
 #include <sys/prctl.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/syscall.h>
 #include <sys/types.h>
 #include <stdlib.h>
@@ skipping 408 matching lines @@
 #endif
   return munmap(base, size) == 0;
 }
 
 
 bool VirtualMemory::HasLazyCommits() {
   return true;
 }
 
 } }  // namespace v8::internal