Fix section issues gcc 15 (#181)

Author: noajshu

.bazelrc

@@ -1,2 +1,7 @@
 common --enable_bzlmod --enable_workspace
 build --cxxopt='-std=c++20'
+# Needed to fix issues like this which arose in GCC 15:
+# "error: relocation refers to local symbol [...], which is defined in a discarded section"
+build --copt=-ffunction-sections
+build --copt=-fdata-sections
+build --linkopt=-Wl,--gc-sections