Fix for code compiled with ld -z separate-code

This generates VAs layout like this:

555555554000-5555555a8000 r--p 00000000 08:02 919707                     /opt/python-3.6.8/bin/python3.6
5555555a8000-55555573d000 r-xp 00054000 08:02 919707                     /opt/python-3.6.8/bin/python3.6
55555573d000-5555557ce000 r--p 001e9000 08:02 919707                     /opt/python-3.6.8/bin/python3.6
5555557cf000-555555835000 rw-p 0027a000 08:02 919707                     /opt/python-3.6.8/bin/python3.6
555555835000-555555865000 rw-p 00000000 00:00 0                          [heap]
7ffff7fd0000-7ffff7fd3000 r--p 00000000 00:00 0                          [vvar]
7ffff7fd3000-7ffff7fd5000 r-xp 00000000 00:00 0                          [vdso]
7ffff7fd5000-7ffff7fd6000 r--p 00000000 08:02 265255                     /lib/x86_64-linux-gnu/ld-2.28.so
7ffff7fd6000-7ffff7ff4000 r-xp 00001000 08:02 265255                     /lib/x86_64-linux-gnu/ld-2.28.so
7ffff7ff4000-7ffff7ffc000 r--p 0001f000 08:02 265255                     /lib/x86_64-linux-gnu/ld-2.28.so
7ffff7ffc000-7ffff7ffe000 rw-p 00026000 08:02 265255                     /lib/x86_64-linux-gnu/ld-2.28.so
7ffff7ffe000-7ffff7fff000 rw-p 00000000 00:00 0
7ffffffde000-7ffffffff000 rw-p 00000000 00:00 0                          [stack]

This is enabled by default on Linux/x86 since 2.29
(f6aec96dce1ddbd8961a3aa8a2925db2021719bb).

Author: Gabriel Corona

src/aslr.cc

@@ -28,8 +28,7 @@ size_t LocateLibPython(pid_t pid, const std::string &hint, std::string *path) {
   std::string line;
   std::string elf_path;
   while (std::getline(fp, line)) {
-    if (line.find(hint) != std::string::npos &&
-        line.find(" r-xp ") != std::string::npos) {
+    if (line.find(hint) != std::string::npos) {
       size_t pos = line.find('/');
       if (pos == std::string::npos) {
         throw FatalException("Did not find libpython absolute path");