www/node26: Fix build by using bundled abseilHEADmain

node26 cannot build against devel/abseil. My assumption is that our
abseil port needs an update (it's 18-ish months old at this point).

For now, get node building again by using the bundled libabsl.

../deps/v8/src/base/platform/mutex.cc:63:18: error: no member named 'lock' in 'absl::Mutex'; did you mean 'Lock'?
   63 |   native_handle_.lock();
      |                  ^~~~
      |                  Lock
/usr/local/include/absl/synchronization/mutex.h:180:8: note: 'Lock' declared here
  180 |   void Lock() ABSL_EXCLUSIVE_LOCK_FUNCTION();
      |        ^
../deps/v8/src/base/platform/mutex.cc:69:18: error: no member named 'unlock' in 'absl::Mutex'; did you mean 'Unlock'?
   69 |   native_handle_.unlock();
      |                  ^~~~~~
      |                  Unlock
/usr/local/include/absl/synchronization/mutex.h:186:8: note: 'Unlock' declared here
  186 |   void Unlock() ABSL_UNLOCK_FUNCTION();
      |        ^
../deps/v8/src/base/platform/mutex.cc:73:23: error: no member named 'try_lock' in 'absl::Mutex'
   73 |   if (!native_handle_.try_lock()) return false;
      |        ~~~~~~~~~~~~~~ ^
3 errors generated.

PR:		298739
Reported by:	kib

0 files changed, 0 insertions, 0 deletions