Update .gitignore

To ignore generated file name changes. After the previous commit's
cilium/ebpf bump the generated files got the following names:

    kprobemultipwru_x86_bpfel.go
    kprobemultipwru_x86_bpfel.o
    kprobemultipwruwithoutoutputskb_x86_bpfel.go
    kprobemultipwruwithoutoutputskb_x86_bpfel.o
    kprobepwru_x86_bpfel.go
    kprobepwru_x86_bpfel.o
    kprobepwruwithoutoutputskb_x86_bpfel.go
    kprobepwruwithoutoutputskb_x86_bpfel.o

Signed-off-by: Martynas Pumputis <m@lambda.lt>

.gitignore

@@ -2,8 +2,8 @@
 pwru
 release
 tags
-kprobepwru_bpf*
-kprobepwruwithoutoutputskb_bpf*
-kprobemultipwru_bpf*
-kprobemultipwruwithoutoutputskb_bpf*
+kprobepwru_*
+kprobepwruwithoutoutputskb_*
+kprobemultipwru_*
+kprobemultipwruwithoutoutputskb_*
 !pwru/