Don't use dynamic page size

This mostly reverts 08050dd5e3 (#54)
because the page size of the host is not necessarily the same as the
page size of the binary. For a proper fix, we'll need some way to
determine the page size of the binary, but ELF doesn't readily provide
this information.

Fixes #69.

src/patchelf.cc

@@ -40,9 +40,10 @@ unsigned char * contents = 0;
 
 
 static unsigned int getPageSize(){
-#if (defined HAVE_SYSCONF)
-    // if present, use sysconf to get kernel page size
-    return sysconf(_SC_PAGESIZE);
+#ifdef MIPSEL
+    /* The lemote fuloong 2f kernel defconfig sets a page size of
+       16KB. */
+    return 4096 * 4;
 #else
     return 4096;
 #endif