Fix missing builtins in C programs linking with compiler_builtins (#17475)

programs/bpf/c/src/float/float.c

@@ -0,0 +1,19 @@
+/**
+ * @brief Example C based BPF program that performs operations
+ * on floating point values.  The test fails if floating point
+ * emulation functions were not linked to the module.
+ */
+#include <solana_sdk.h>
+
+extern uint64_t entrypoint(const uint8_t *input) {
+  SolAccountInfo ka[1];
+  SolParameters params = (SolParameters) { .ka = ka };
+
+  if (!sol_deserialize(input, &params, SOL_ARRAY_SIZE(ka))) {
+    return ERROR_INVALID_ARGUMENT;
+  }
+  uint32_t *data = (uint32_t *)(params.ka[0].data);
+  *data += 1.5;
+
+  return SUCCESS;
+}