spdm: fixup measurement block length

Signed-off-by: Wilfred Mallawa <[email protected]>

Author: twilfredo

src/libspdm/spdm.rs

@@ -1533,7 +1533,8 @@ unsafe fn libspdm_fill_measurement_image_hash_block(
         (*measurement_block)
             .measurement_block_common_header
             .measurement_size = core::mem::size_of::<spdm_measurement_block_dmtf_header_t>() as u16
-            + libspdm_rs::SPDM_MEASUREMENT_SPECIFICATION_DMTF as u16;
+            + libspdm_rs::SPDM_MEASUREMENT_SPECIFICATION_DMTF as u16
+            + data.len() as u16;
 
         (measurement_block.add(1) as *mut u8).copy_from(data.as_ptr(), data.len());