meson: Enable link time optimization

Currently local boost subproject compilation fails with a message:
"""
../subprojects/boost-1.84.0/libs/container/src/dlmalloc_ext_2_8_6.c:
1085:41: error: iteration 2305843009213693951 invokes undefined
behavior [-Werror=aggressive-loop-optimizations]
 1085 |                size = request2size(sizes[i]*element_size);

...

cc1: all warnings being treated as errors
"""
To solve the issue enable link time optimization.

Tested:
"meson setup build && cd build && meson compile" finishes successfully.

Change-Id: I6a146c5067d4d9eda163b18f9307b8b36eaedac5
Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
diff --git a/meson.build b/meson.build
index 967087a..2a1b06c 100644
--- a/meson.build
+++ b/meson.build
@@ -6,6 +6,7 @@
         'warning_level=3',
         'werror=true',
         'cpp_std=c++23',
+        'b_lto=true',
     ]
 )