[libunwind] Fix return type of `DwarfFDECache::findFDE()` in definition (#146308)

Needed to resolve this compilation error on some systems:

lib/libunwind/src/UnwindCursor.hpp:153:38: error: return type of
out-of-line definition of 'libunwind::DwarfFDECache::findFDE' differs
from that in the declaration
    typename A::pint_t DwarfFDECache<A>::findFDE(pint_t mh, pint_t pc) {
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
lib/libunwind/src/libunwind.cpp:31:10: note: in file included from
lib/libunwind/src/libunwind.cpp:31:
    #include "UnwindCursor.hpp"
             ^
lib/libunwind/src/UnwindCursor.hpp:100:17: note: previous declaration is
here
      static pint_t findFDE(pint_t mh, pint_t pc);
             ~~~~~~~^

NOKEYCHECK=True
GitOrigin-RevId: eb0d8f9272f7c734cdaf31bc33a18e1619e021e4
1 file changed
tree: 29570535a615357e2ec9d9e6d140bd93d9273ca7
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT